{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{8}{c}}
\toprule
                    &\multicolumn{2}{c}{\emph{E. coli} present}&\multicolumn{2}{c}{TC present} &\multicolumn{2}{c}{\emph{E. coli} (MPN)}&\multicolumn{2}{c}{TC (MPN)}   \\
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   &\multicolumn{1}{c}{(5)}   &\multicolumn{1}{c}{(6)}   &\multicolumn{1}{c}{(7)}   &\multicolumn{1}{c}{(8)}   \\
\midrule
Training            &       -0.14** &               &       -0.23*  &               &       -0.28*  &               &       -0.42   &               \\
                    &      (0.07)   &               &      (0.13)   &               &      (0.15)   &               &      (0.42)   &               \\
Training + supplies &       -0.10   &               &       -0.28** &               &       -0.08   &               &       -0.55   &               \\
                    &      (0.08)   &               &      (0.13)   &               &      (0.25)   &               &      (0.45)   &               \\
Training, any       &               &       -0.12*  &               &       -0.25** &               &       -0.18   &               &       -0.48   \\
                    &               &      (0.07)   &               &      (0.11)   &               &      (0.18)   &               &      (0.38)   \\
\midrule
T vs T $+$ S: $ p $ value&       0.329   &               &       0.703   &               &       0.329   &               &       0.762   &               \\
Control mean        &        0.14   &        0.14   &        0.55   &        0.55   &        0.28   &        0.28   &        1.31   &        1.31   \\
\bottomrule
\end{tabular}
}
